Rotary pump or motor



. 3, 1935. E. R. DUDLEY ROTARY PUMP 0R MOTOR- Original Filed April 1.

1930 3 Sheets-Sheet 1 v n mam m m W m m J m a W m s w M.

Dec. 3, 1935. E. R, DUDLEY ROTARY PUMP on mo'ron Original Filed April 11930 3 Sheets$heet 3 INVENTOR, EOMOND R DUDLEY ATTORNEYS.

Reissued n... a, 1935 UNITED STATES PATENT OFFICE many PUMP on no'roaEdmond a. Dudley, Altadena, Calif. Original No. 1.889.053. am July so,1932, Serial No. 440,796, April 1, 1930. Application for relsalle Ill!23, 1934- Serial No. 736,619

My invention relates to and has for a purpose the provision of a rotarypump or motor which in one of its uses can be driven from a suitablesource of power to eifect the pumping of fluids with maximum efliciency,and in another use will function as a prime mover of highefliciency bysupplying fluid under pressure thereto.

The invention is particularly directed to the class of rotary machineswherein use is made of a stator and a concentric rotor, the latterhaving rotary abutments eccentrically of and parallel to the axis of therotor, and the former having abutments extending into the workingchamber of the stator and co-acting with the rotary abutments toeffectively induce suction in the chamber and thereby draw the fluidthereinto where it will be compressed between a stator abutment and arotary abutment, then discharged under pressure from said chamber. It isan important object of the invention to provide a rotary mahine of thistype wherein means are employed to positively prevent leakage at thelines of contact of the rotary abutments with the stator wall and at theline of contact of a rotary abutment with a co-operable stator abutmentand to constantly employ a plurality of rotary abutments which willfunction to elect a continuous pumping of the fluid, during whichoperation one stator abutment and one rotary abutment and all the 80remaining rotary abutments and the stator will positively function toprevent the by-passing of fluid from an intake port to a discharge portof the stator, thereby enabling the machine to be economically andeffectively used to compress to a relatively high degree of compressionthe fluid being acted upon.

A further object is to provide a novel construction of sealing means forthe stator abutments which is movable radially of the axis of the rotorand which is co-operable at one time with the roary abutment topositively close 011 communication between an intake port and anadjacent discharge port and which, at another time, co-acts with theperipheral surface of the rotor to form a fluid seal at theline betweensaid surface and said means to prevent fluid losses during discharge ofthe compressed fluid through the discharge ports of the stator.

A further object is to provide sealing means at the stator abutmentswhich can be adjusted radially to increase the sealing eflect thereof asmay be required to compensate for wear upon the surfaces in the ordinaryoperation of the machine.

6 It is a further purpose of my invention to provide a device of theabove described character which will eilectively pump liquids containingsand and other foreign particles such as is found in oil and waterwells, all without clogging or damage by such foreign matter in thefluid be- 5 ing pumped.

I will describe only one form of rotary pump or motor embodying myinvention and will then point out the novel features thereof in claims.

In the accompanying drawings, 1

Figure 1 is a view showing in vertical longitudinal section one form ofrotary pump or motor embodying my invention;

Figure 2 is a transverse sectional view taken on the line 2-2 of Figure1 and lookingin the15 direction of the arrows;

Figures 3 and 4 are transverse sectional views on a reduced scale,taken, respectively, on the lines 3-3 and 4-4 of Figure 1 and looking inthe directions-of the respective arrows; 20

Figure 5 is a fragmentary sectional view taken on the line 8-5 of Figure2 and looking in the direction of the arrows.

Referring specifically to the drawings, in which similar referencecharacters designate similar 25- partsin each of the several views, myinvention, in its present embodiment, comprises a stator S constructedof metal to provide a central and open ended cylindrical section II, andcircular end sections II and ii closing the open ends of so the centralsections and secured'thereto in any suitable manner. The end sections Iiand ii are provided axially with bearings i3 and II, respectively, inwhich is journaled a shaft II. The shaft l5 projects exteriorly of thesection I2, 35 through a suitable stufling box I! provided on thesection I! so asto form a fluid tight seal around the shaft, preventingthe escape of pressure from within the stator.

Fixedtotheshaft libyakey llisarotorR40 in the form of a cylinder,reduced in diameter between its ends as indicated at II to co-act withthe stator S in defining a continuous annular passage is between thestator and rotor.

The end portions of the rotor are slightly less 45 in diameter than theinternal diameter of the central section iii of the stator, andinterposed between such portions of the rotor and the central sectionare metallic liners "-20, the confronting edges of which are rabbeted asindicated 50 at Il-Il to receive the edges of and clamp a liner 22 oiyieldable material such as resilent rubber, against displacement fromthe inner periphery of the central section II. The liner 2! thus formsthe outer peripheral wall of the pasafter described.

Supported from the central section Iii oi the stator S are statorabutments A, and in the present instance three such abutments are shownand are radially disposed at equally spaced intervals circumi'ercntiallyoi the stator. The abutments A are all identical in construction andeach comprises a rectangular plate 23 projecting through registeringslots in the central section III and liner 22, into the passage I9 so asto span the latter transversely. Each abutment A is provided withlateral flanges 24 seating in a recem 25 formed in the central sectionIt, and secured to the latter by bolts 26 so that the abutments will berigidly supported in fixed positions in the stator. The plate 23 oi eachabutment A is slotted from its innermost edge to slidably receive ayieldable packing member 21 of resilient rubber, and a metal pressurebar 28 which abuts the member and is engaged by screws 29. The screws 2!are threaded into the abutment and are operable when rotated to forcethe packing member radially inward into engagement with the periphery ofthe rotor R in the passage l9 and thus form a fluid tight seal.

For co-action with the stator abutments A I provide a plurality oi rotorabutments A of which four are shown in the present instance. The rotorabutments are rotatably mounted in the rotor R, eccentrically of andparallel to the axis of the rotor at equally spaced intervalscircumierentially.

The rotor abutments A are identical in construction and each comprises acylindrical bochr reduced in diameter at its ends to provide journalsIll and 3| rotatably mounted in bearings 22-32 in the rotor so that thebody projects into and spans the passage I9 and has rolling contact withthe yieldable liner 22, which latter functions as a result of itsyieldability, to provide a fluid tight seal between the rotor abutmentsand the stator during rotation of the rotor.

Fixed to the extremity of the journal 30 of each rotor abutment A is agear 33 constantly meshing with an internal ring gear 34 flxed to thecentral section In of the stator so that during rotation of the rotor,the rotor abutments will be rotated and thus planet about the axis ofthe rotor.

In order to enable the rotor abutments to pass the stator abutmentsduring rotation of the rotor, the body of each rotor abutment isprovided with a recess into which the stator abutments are received insuccessive order, due to the timed relationship between the rotationalmovement or the rotor and the combined rotational and planetingmovements oi the rotor abutments. It will be noted that the periphery oithe body of each rotor abutment A is provided with grooves 36 extendinglongitudinally of the body and coacting with the rotor and with theliner 22 to form pockets for receiving and conveying through the passagel9 any solid particles or other foreign matter such as sand, so as toprevent clogging of and possible damage to the device.

For each stator abutment A, and inlet 21 and an outlet 28 is provided inthe stator so as to communicate with the passage I! at opposite sides01' the stator abutment and thus be separated by the latter. The inlets21 are connected to a main inlet pipe 39 by means of an arcuate branchpipe 40, whereas the outlets 28 are connected to a main outlet pipe 4|by a branch pipe 42 also of arcuate form.

An oil i'eed pipe 43 leading from a source of oil 'sage l9, andfunctions in a manner to be hereinsupply under pressure (not shown) isconnected to the end section ll of the stator S and communicates througha duct 44 with a chamber 4| in the stator so as to provide lubricationfor the gears 22 and 34. A water ieed pipe 46 is con- 5 nected to theend section I2 oi the stator and communicates through a duct 41 with achamber 48 in the stator at one end or the rotor. and a second waterfeed pipe 49 is connected to the central section ill of the stator andcommuni- 1 cates through a duct 50 with the periphery oi the rotoradjacent its opposite end. During the operation of the device, water orother fluid under pressure from a suitable source of supply (not shown)is supplied to the pipes 46 and 49 15 and sets up counter pressure inthe stator at opposite sides of the pasage J9, sufficient to conflne anyfluid in the passage against escape therefrom between the rotor andstator, thus preventing any loss of pressure developed by the device 20during its operation.

In the use of my invention as a pump, its operation is as follows:

With the rotor R driven in the direction of the arrow in Figure 2, therotor abutments A will be 25 driven by the gears 33 and will be rotatedin the directions of their respective arrows, as shown in this figure.As each rotor abutment'passes one of the inlets 31, it will co-act withthe respective stator abutment A to induce suction in the passage 30 itbetween the rotor abutment and the stator abutment, so that with themain inlet pipe 39 connected to a source of fluid to be pumped, fluidwill be drawninto the passage in the rear of each rotor abutment.Furthermore, pressure'will be 35 set up in the passage l9 between eachrotor abutment and the particular stator abutment immediately in advancethereof, so that as operation of the rotor continues, the fluid drawninto the passage l9 by any one'rotor abutment will be ad- 40 vanced inthe passage by the next succeeding rotor abutment and forced through oneof the outlets 38 to the main outlet pipe 4|.

By the provision of three stator abutments and tour rotor abutments asshown, a continuous 45 pumping of the fluid will be effected, as threeof the four rotor abutments are at all times active to pump the fluid.On reference to Figure 2 of. the drawings, it will be noted that therotary abutment A at the top has its recess 35 confronting the 50yieldable liner 22 and that the inner edge 01 the packing member 21 isin fluid sealed contact with the inner wall of said recess, thuspositively preventing the by-passing of fluid from the intake 31 to theoutlet 38. All the remaining rotary abut- 65 ments are in rollingcontact with. the yieldable liner 22. The lower packing members 21 arein fluid sealed contact with the peripheral wall or the rotor R. Itfollows therefrom that the fluid will be effectively compressed againstthe next 6 adjacent stator abutment without any possibility oi leakageat any of the contact lines, and'that the pump will, therefore, operateat a high rate 01' efllciency, there being no pressure losses at any ofthe contact lines between either the rotary 65 abutments and the armularwall of the stator or between the periphery of the rotor and the packingmembers 21 or between any rotary abutment and its co-acting packingmember 01 the stator abutment. I lay particular stress upon the use in a10 machine of this type of an equal number at rotary abutments A and anunequal number of stator abutments, the latter equi-distantly spacedapart from each other within the working space I0 and carried by thestator and the rotary abutl6 ments being equi-distantly spaced from eachother around the rotor R. The rotary abutments are thus arranged indiametrically opposite pairs and in consequence thereof a very flnebalancing of the rotor is provided, and by equi-distantly spacing thestator abutments from each other as described, the frictional resistanceoflered the rotor by the members 21 is equalized at the respectivepoints of contact of same therewith. It will be appreciated that theprinciple embodied in my invention can, with respect to the sealingmeans employed herein, be practiced with but a single stator abutmentand a single rotor abutment, which arrangement, however, has thedisadvantage of producing an intermittent pumping action rather than themost desirable and eflicient continuous pumping of a fluid.

In the use 01 my invention as a motor or prime mover, it will be clearthat by supplying a fluid under pressure to the main inlet pipe 39, thefluid in entering the passage is through the inlets 31 will set uppressure in the passage, causing the rotor and stator abutments toco-act in rotating the rotor R in the direction 01' the arrow in Figure2; the pressure fluid after use being discharged from the passagethrough the outlets 38.

Although I have herein shown and described only one form of rotary pumpor motor embodying my invention, it is to be understood that variouschanges and modifications may be made therein, without departing fromthe spirit of the invention and the spirit and scope of the appendedclaims.

I claim as my invention:

1. A device of the character described comprising a cylindrical stator,a cylindrical rotor journaled axially in the stator and reduced indiameter intermediate its ends to define an annular passage between thestator and rotor having an inlet and an outlet, the rotor being oi lessdiameter than the internal diameter of the stator, metallic linersinterposed between the stator and the end portions 01 the rotor, a linerof yieldable material interposed between the stator and the intermediateportion of the rotor, co-acting means on said liners for securing theyieldable liner against displacement, and co-actlng means on the statorand rotor, responsive to rotation of the rotor, to pump fluid from theinlet through the passage to the outlet.

2. A device of the character described comprising a cylindrical stator,a cylindrical rotor Journaled axially in the stator and reduced indiameter intermediate its ends to define an annular passage between thestator and rotor having an inlet and an outlet, the rotor being of lessdiameter than the internal diameter of the stator, metallic linersinterposed between the stator, and the end portions of the rotor, aliner of yieldable material interposed between the stator and theintermediate portion oi the rotor, the confronting edges of the metallicand yieldable liners having rabbeted engagement to secure the yieldableliner against displacement, and co-acting' means on the stator androtor, responsive to rotation of the rotor, to pump fluid from the inletthrough the passage to the outlet.

. I 3 3. In a rotary machine of the type described, the combination witha stator and a co-operable rotor, between both or which is a workingspace, an even number of equi-distantly spaced rotary abutments carriedby the rotor and an uneven 5 number of radial abutments carried by thestator and extending into said working space for successive co-actionwith the rotary abutments, the stator having fluid intake and dischargeports opening to the working space at the respective l0 sides of each ofthe stator abutments, of a yieldable non-metallic liner embraced by theannular wall of the stator and over which the rotary abutmentsyieldingly roll while in constant fluidsealed contact therewith; andyieldable means carried by the stator abutments for fluid-sealingcontact successively with the rotary abutments during operation 01' therotor.

4. A rotary pump including a stator and a cooperable rotor, the statorhaving an annular wall and the rotor having a peripheral surfacecooperable with said annular wall to define therewith an interveningworking space therebetween, the stator having a yieldable liner embracedby said annular wall, the stator having an abutment provided with ayieldable member adjustable transverseLv of the working spaceand'against the peripheral surface otthe rotor, the stator having fluidintake and discharge ports at the opposite sides oi its abutment, and arotary abutment carried by the rotor and extending into said workingspace for co action, respectively, with the yieldable liner and theaforestated yieldable member during rotation of the rotor, and havingconstant engagement with said liner.

5. A rotary pump including a stator provided with an uneven number ofpairs oi fluid intake and discharge ports, respectively, a rotorco-operable with the stator and defining therewith a, working space, anabutment extending into the 40 working space from between each pair ofintake and discharge ports; an annular member of yieldable'materiallining the wall of the stator, an. even number of cylindrical rotaryabutments carried by the rotor and co-operable with said annularyieldable member and with the stator abutments to suck fluid into thespace at the intake ports, then compress the fluid and discharge samefrom the discharge ports, and being in constant rolling engagement withsaid annular member each stator abutment including a yieldable membermovable relatively to the peripheral surface or v the rotor and adaptedto engage with the rotary abutments when the latter occupy positionsbetween the intake and discharge ports to positively seal the spacesbetween same and thereby prevent fluid from the discharge sidesby-passing to the intake sides of the rotary abutments, the relation ofthe stator abutments with respect to v the rotary abutments being suchthat at all times so one of the rotary abutments co-acts with one of thestator abutments while all remaining rotary abutments are being moved inactive pumping directions through said working space.

EDMOND R. DUDLEY.

